BJJ: very mixed crowd, very academic and “text-based”
Bnos Sarah: more out of town crowd, warm and homey, less academic than BJJ but still “text-based”
Bnos Chava: your typical Flatbush girl kind of crowd (or 5-towns), not very text-based
Just be aware that there are many other seminaries out there and each year new ones open. Don’t limit yourself to only 3. Do your research and find out about a lot of places, then narrow your selection based on what you hear. Also speak to alumni of the schools you are considering. They have the most first-hand and accurate information.
Hatzlacha!